Initial Tests; Resistance Checks - Heathkit HR-1680 Manual

Page 66
INITIAL TESTS
The purpose of this section of the Manual is to make sure your
Receiver operates properly and will not be damaged as a
result of a wiring error. A transistor or other component, for
example, could be destroyed instantly by a short circuit that
causes excessive current.
RESISTANCE CHECKS
Gague.rerre
PRIMARY WIRING TESTS
A wiring error in the primary wiring circuit (line cord, On-Off
switch, etc.) of your Receiver could cause you to receive a
severe electrical shock, These "Primary Wiring Tests" will
assure you that no such wiring errors exist. °
( ) Be sure the fine cord is not plugged in.
( ) Turn the AF GAIN controi to OFF.
{f you do not have an ohmmeter, carefully check the line cord,
fuse block, switch SW1, and the transformer wiring against
that shown in Pictorials 5-3, 5-4, 5-14, and Detail 5-14D or
5-14&. Make sure there are no fine strands of wire, or solder
blobs, touching adjacent terminals or the chassis. Then pro-
ceed to "Sound Check" on Page 70.
If you have an ohmeter, perform the following resistance mea-
surements.
() Turn on your ohmmeter and allow it to warm up, if
necessary.
() Set your ohmmeter on the R X 10 range.